Expandable shelf



FIG. 1 is a perspective view of an expandable shelf showing a new design;

FIG. 2 is a front view of the expandable shelf of FIG. 1;

FIG. 3 is a right side view of the expandable shelf of FIG. 1;

FIG. 4 is a left side view of the expandable shelf of FIG. 1;

FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 2;

FIG. 6 is a top view of the expandable shelf of FIG. 1;

FIG. 7 is a bottom view of the expandable shelf of FIG. 1;

FIG. 8 is a perspective view of another embodiment of the expandable shelf of FIG. 1; and,

FIG. 9 is a cross-sectional view taken along line 9-9 of FIG. 8.

The components of the display shown in broken lines illustrate portions of the expandable shelf form no part of the claimed design. 

CLAIM What is claimed is the ornamental design for an expandable shelf, as shown and described. 